Question

What are isobaric intervals?

Answer 1

Answer:

Explanation:

Isobars are lines showing points of equal air pressure on a map. An isobaric map is analogous to a topographic map, where, on a topo map, lines represent points of equal elevation. An isobaric interval is chosen depending on how many isobar lines are desired. For example, an interval of 4 millibars means that an isobar line will be drawn for every 4th millibar increment in air pressure (1 atm pressure is about 1000 millibars). So one might draw isobars for 992mb, 996mb, 1000mb, 1004mb, and so on.

Drawing isobars is not a matter of connecting the dots. Rather, you have to interpolate between points where actual pressure are known in order to figure out where an isobar line will pass between points.